77163745 has 8 divisors (see below), whose sum is σ = 93416616. Its totient is φ = 61184256.

The previous prime is 77163733. The next prime is 77163817. The reversal of 77163745 is 54736177.

It can be written as a sum of positive squares in 4 ways, for example, as 3873024 + 73290721 = 1968^2 + 8561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77163745 - 2¹³ = 77155553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77163698 and 77163707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67722 + ... + 68851.

It is an arithmetic number, because the mean of its divisors is an integer number (11677077).

Almost surely, 2^77163745 is an apocalyptic number.

It is an amenable number.

77163745 is a deficient number, since it is larger than the sum of its proper divisors (16252871).

77163745 is a wasteful number, since it uses less digits than its factorization.

77163745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136691.

The product of its digits is 123480, while the sum is 40.

The square root of 77163745 is about 8784.2896696318. The cubic root of 77163745 is about 425.7334417275.

It can be divided in two parts, 771 and 63745, that added together give a square (64516 = 254²).

The spelling of 77163745 in words is "seventy-seven million, one hundred sixty-three thousand, seven hundred forty-five".